On my problem with London

I don't like going to London much.
I don't like going to London, because I don't feel comfortable in big cities with all their crowds in haste.
But mostly I don't like going to London because I like it too much. Like Paris. Like Berlin.
I spend the day doing the touristy stuff, pushing my way through crowds, being pushed myself, clinging on to my handbag and to Paul's hand so that this whole unspeakable energy and movement would not suck me in and make me disappear.
But then we sit somewhere for a drink and I start watching people walking past and my mind starts imagining the lifes they have, what it would be like to be their friend or colleague or neighbour, and I spot a street with particularly nice (interesting, unusual, ugly) houses (trees, shades, lamp posts, you name it) and I start wondering what it would be like if that street was mine, if I lived there/walked past it every day, if the pub/cafe I'm sitting in was my pub/cafe, what friends I would have if I was hanging out here, what kind of job I'd be doing, and a whole new unknown life starts unravelling itself in my mind.
The itch.
Later on I get back home, I wash off all the metallic dust of the underground, and I feel relieved that all that buzzing and chaos are far away from me and I am safe in my little house. The itch subsides a little.
But then I go to bed and I fall asleep listening to the cars driving past my window and I wonder where they are going to, are they going to one of those unknown lives I lurked into earlier on that day? Or to yet a different one, in yet a different place?
What is it like? What would it be like to live there?
And it saddens me that I will never find out...